diff --git a/main.lua b/main.lua
index 7c6fbc9..dad317d 100644
--- a/main.lua
+++ b/main.lua
@@ -137,7 +137,7 @@ function main_scene(do_backdrop, do_logo)
                 selected = true
                 self"sprite".color = vec4(1)
                 if win:mouse_pressed("left") then
-                    vplay_sfx(math.random(1000000000))
+                    vplay_sfx(math.floor(math.random() * 1000000000))
                 end
             else
                 selected = false
@@ -148,10 +148,16 @@ function main_scene(do_backdrop, do_logo)
         group:append(logo)
     end
 
+    local max
+    if not math.log10 then
+        max = math.ceil(math.log(HEX_GRID_WIDTH * HEX_GRID_HEIGHT, 10))
+    else
+        max = math.ceil(math.log10(HEX_GRID_WIDTH * HEX_GRID_HEIGHT))
+    end
     local seed_textfield, get_seed_textfield_value = gui_make_textfield{
         position = vec2(win.left + 190, 50),
         dimensions = vec2(90, 40),
-        max = math.ceil(math.log(HEX_GRID_WIDTH * HEX_GRID_HEIGHT, 10)),
+        max = max,
         validate = function(string)
             return not string.match(string, "%D")
         end,
@@ -177,7 +183,7 @@ function main_scene(do_backdrop, do_logo)
         {
             texture = TEXTURES.LOAD_GAME_HEX,
             action = function()
-                local save = am.load_state("save", "lua")
+                local save = am.load_state("save", "json")
 
                 if save then
                     game_init(save)
diff --git a/src/game.lua b/src/game.lua
index 904e445..b5e3d65 100644
--- a/src/game.lua
+++ b/src/game.lua
@@ -22,7 +22,7 @@ local game_scene_menu_options = {
     {
         texture = TEXTURES.LOAD_GAME_HEX,
         action = function()
-            local save = am.load_state("save", "lua")
+            local save = am.load_state("save", "json")
 
             if save then
                 game_init(save)
@@ -741,7 +741,7 @@ function game_end()
 end
 
 function game_save()
-    am.save_state("save", game_serialize(), "lua")
+    am.save_state("save", game_serialize(), "json")
     gui_alert("succesfully saved!")
 end